Answer:
The time is 
Explanation:
From the question we are told that
The height of the platform where the ball was dropped from is s = 215 m
The acceleration due to gravity is 
Generally from kinematic equations
Here u is the initial velocity of the ball and the value is u = 0 m/s given that the ball was at rest before it was dropped
So
=> 
=> 
=>
Answer:
ummmm sea urchents are mostly in some areas??
Explanation:
thats ny guess??
Answer:
Mostly yes
Explanation:
But you should consider,brand value, material used and lasting of the equipment also
HP stands for horsepower
It's mostly used in pumps
Answer:
Force the floor exerts on the passenger is 833 N.
Explanation:
- Weight of passenger (
) = mg = 85 × 9.8 N = 833 N
- Force the floor exerts on the passenger (
) = ?
- For the elevator with the speed as 2.0 m/s the net force is zero, it means that the force is balanced.
i.e. = - = -mg = 833 N
hence is 833 N
- If the lift was not at a constant speed i.e. if it had acceleration (
) then the case would be different.
The potential energy would be zero. Only kinetic energy is present in this case. To find out what the answer is we do the equation: mv^2/2 soo...
KE =mv^2/2
KE= 1(2^2)/2 which the answer will come up by 2 Joules.
